107 Temperature Probe
Rugged, Accurate, Versatile
Can be used in a variety of applications
weather aplicaciones soportadas water aplicaciones soportadas energy aplicaciones soportadas gas flux and turbulence aplicaciones soportadas infrastructure aplicaciones soportadas soil aplicaciones soportadas


The 107 is a rugged, accurate probe that measures temperature of air, soil, or water from -35° to +50°C. It easily interfaces with most Campbell Scientific dataloggers and can be used in a variety of applications.

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Benefits and Features

  • Versatile product—measures air, soil, or water temperature
  • Easy to install or remove
  • Durable
  • Compatible with AM16/32-series multiplexers, allowing measurement of multiple sensors


Detailed Description

The 107 consists of a thermistor encapsulated in an epoxy-filled aluminum housing. The housing protects the thermistor allowing the probe to be buried in soil or submerged in water.


Sensor Description BetaTherm 100K6A1IA Thermistor
Tolerance ±0.2°C (over 0° to 50°C range)
Temperature Measurement Range -35° to +50°C
Temperature Survival Range -50° to +100°C
Steinhart-Hart Equation Error ≤±0.01°C over measurement range (CRBasic data loggers only)
Polynomial Linearization Error Typically < ±0.5°C over measurement range (Edlog data loggers only)
Time Constant in Air 30 to 60 s (in a wind speed of 5 m s-1)
Maximum Submergence 15 m (50 ft)
Probe Diameter 0.76 cm (0.3 in.)
Probe Length 10.4 cm (4.1 in.)
Maximum Cable Length
  • 305 m (1000 ft) is typical and requires no programming changes.
  • 762 m (2500 ft) requires programming changes. (Refer to section 8.4 of the 107 manual for assistance.)
Weight 136 g (5 oz) with (3.05 m) 10 ft cable


Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.


Product Compatible Note
CR1000 (retired)
CR3000 (retired)
CR800 (retired)
CR850 (retired)

Additional Compatibility Information

Data Logger Considerations

One single-ended channel per probe is required; an excitation channel can be shared by several probes.

Installation Considerations

Air Temperature

When exposed to sunlight, the 107 should be housed in a 41303-5A, 41303-5B, or RAD06 6-plate radiation shield. The louvered construction of these radiation shields allows air to pass freely through the shield, thereby keeping the sensor at or near ambient temperature. The shields’ white color reflects solar radiation.

The RAD06 uses a double-louvered design that offers improved sensor protection from driving rain, snow, insect intrusion and has lower self-heating in bright sunlight combined with higher temperatures (> 24°C [~75°F]) and low wind speeds (< 2 m/s [~4.5 mph]), giving a better measurement.

The 41303-5A and RAD06 attach to a crossarm, mast, or usersupplied pipe with a 2.5 to 5.3 cm (1.0 in to 2.1 in.) outer diameter. The 41303-5B attaches to a CM500-series pole or a user-supplied pole with a 5.1 cm (2.4 in.) outer diameter.

Soil Temperature

The 107 is suitable for shallow burial only. Placement of the sensor’s cable inside a rugged conduit may be advisable for long cable runs—especially in locations subject to digging, mowing, traffic, use of power tools, or lightning strikes.

Water Temperature

The sensor can be submerged to 15 m (50 ft) or 21 psi. Please note that the 107 is not weighted. Therefore, the installer should either add a weighting system or secure the sensor to a fixed, submerged object, such as a piling.


To measure large numbers of probes, the AM16/32B multiplexer is recommended.


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